would love to go with metal but not sure if the extra cost is worth it

Absolutely. Quality metal roofing (galvalume standing seam) will last forever but is typically at least 2X the cost of asphalt shingles.

You can get Owens Corning Duration Shingles with a Platinum Warranty that's lifetime. 25 years workmanship (as in no leaks!!), 50 years on labor and material.

Make sure you use a Platinum Preferred contractor with Owens Corning and buy the Platinum Warranty.

Yes